<html>
    <head>
        <title>Test</title>
        <style></style>
        <script>

document.on("click","button#read", function() {
  const out = document.$("pre#content");
  const clipboardData = Clipboard.read();

  out.innerText = JSON.stringify(clipboardData, null, "  ");

});

        </script>
    </head>
    <body>

    <button#read>Read clipboard</button>

    <pre#content />

    </body>
</html>